I've used a Dunlop High Gain volume pedal for several years. Very happy with it over others, including the Ernie Ball VP Jr. (Replaced 3 Kevlar strings in 6 months with that one, and I'm not rough on my gear at all). While the Dunlop is not huge (Cry Baby case & smaller than the EB), I decided to look for something with a smaller footprint. In addition the the EB, I previously tried a DOD FX17, AMT LLM2 and a Morley Mini-Volume. All of these pedals required power, and I could live with that, but it really didn't bring much to the table in return. The Boss is passive and requires no power to operate. Like my Dunlop. The DOD was the best of this lot, though I never found a usable wah tone. But I had gotten it for the volume side. Nice sweep, no noise, and solid build. Problem here was that the pedal required a non standard DC adapter or batteries. Batteries didn't last very long and I just wasn't going to run another adapter. When the battery died in mid-song, so did you signal. I decided to move on. The AMT was extremely uncomfortable due to size of pedal vs size of my size 12 foot. Because of its size and weight, I'm not sure it could be used off a pedal board. In addition, the 0 dB boost was not unity and there was significant bottom end loss. I could never find a clean unity setting with this pedal. If boosted to 6dB, the tone loss was not as apparent, but I did not want the boost. The Morley, while a small treadle, actually had a wider footprint than my Dunlop. In addition, the throw forward took my foot to an uncomfortable position to get full volume. I sold the DOD & Morley and returned the AMT. Keeping the trusty Dunlop. Boss FV-30H I received the new Boss FV-30H volume pedal earlier this week. A/B'd at home with no other pedals in line and if there's any tone/signal loss, I can't hear it at any volume level. The FV30 puts thru a very nice unity signal. As far as I can hear, plugging a tuner into the tuner out has no effect on the signal. Good feature and works great. The pedal is about 3" shorter than the Dunlop, but it is very comfortable under foot. Also opens up some additional space on my board for a tuner or a digital clock. Works well on a pedalboard or on the floor. Took it to a rehearsal Monday night and it performed exceptionally well. Fully forward is unity and fully back is totally off. The pedal does a very nice job on swells, kicking volume up/down for solo/rhythm, and does a really nice job controlling volume and sustain while playing slide with a fuzz. "Off" means "Off" (unlike some of the earlier AMTs which never fully muted your signal). My only small issues are that 1) you'll need to rock forward about 20% before any signal can be heard, and 2) the full throw is a bit more than I'm used to with my Dunlop. I'll get used to this with a little more time. The aluminum case is solid and well built. Haven't opened it up, so I don't know of any internal adjustments. The manual doesn't mention any, but it does cover 10 different languages so your stage crew can understand how a passive volume pedal works while you're on tour pretty much anywhere in the world.. The volume mechanism uses a metal shaft rather than the EB Kevlar string, or the Dunlop wah-type gears. This should last a long time, although I have been very happy with the quality and sound of the Dunlop. Last night was the first gig test, and, aside from the above, it performed great. Time will tell, but I believe Boss has a real winner with this pedal and I wouldn't hesitate to recommend it. Anyone looking for a nice, small footprint volume pedal should check this one out.